DE60214279T2 - Water-cooled internal combustion engine - Google Patents

Water-cooled internal combustion engine Download PDF

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Publication number
DE60214279T2
DE60214279T2 DE2002614279 DE60214279T DE60214279T2 DE 60214279 T2 DE60214279 T2 DE 60214279T2 DE 2002614279 DE2002614279 DE 2002614279 DE 60214279 T DE60214279 T DE 60214279T DE 60214279 T2 DE60214279 T2 DE 60214279T2
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DE
Germany
Prior art keywords
cylinder head
coolant
outlet
inlet
channel
Prior art date
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Expired - Fee Related
Application number
DE2002614279
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German (de)
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DE60214279D1 (en
DE60214279T8 (en
Inventor
Yoshiaki Wako-shi Iizuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
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Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to JP2001148408A priority Critical patent/JP3775572B2/en
Priority to JP2001148408 priority
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of DE60214279D1 publication Critical patent/DE60214279D1/en
Application granted granted Critical
Publication of DE60214279T2 publication Critical patent/DE60214279T2/en
Publication of DE60214279T8 publication Critical patent/DE60214279T8/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18993732&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE60214279(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Expired - Fee Related legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/20Multi-cylinder engines with cylinders all in one line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • F02F1/26Cylinder heads having cooling means
    • F02F1/36Cylinder heads having cooling means for liquid cooling
    • F02F1/40Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • F01P2060/08Cabin heater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B2075/1804Number of cylinders
    • F02B2075/1816Number of cylinders four

Description

  • BACKGROUND OF THE INVENTION
  • 1. Field of the invention
  • The The present invention relates to a water-cooled internal combustion engine which is one of a coolant circulation pump discharged coolant through a head-side cooling jacket, which is formed in a cylinder head, a block-side cooling jacket, which is formed in a cylinder block, is supplied.
  • 2. Description of the stand of the technique
  • A in the document JP-A-2000-282861 described conventional internal combustion engine known as the water-cooled type internal combustion engine. At this Multi-cylinder internal combustion engine is a communication path at one End region of a cylinder head in a direction in which the cylinder are arranged therein, provided by a coolant circulation pump discharged coolant in a cooling jacket and at the other end portion of the cylinder head in the arrangement direction of the cylinder, a thermostat, a bypass line and an exhaust passage through which a cooling jacket flowing out in a cylinder block coolant in a cooler escape can. In an intermediate position between a hose, the on a downstream one Area of the cooling jacket in the cylinder head on one side of the cylinder head in one too the arrangement direction of the cylinder is connected to the vertical direction and a hose connected to a downstream portion of a hose Cylinder block formed Kühlmittellei device is connected, is a heating heat exchanger for air conditioning intended. There is also a thermostat cover covering the thermostat integral with an inlet opening formed, to which a radiator hose is connected, through which coolant flows from a radiator, and an outlet opening, to the a radiator hose is connected, through which returning to the radiator coolant flows.
  • on the other hand a relatively high amount of exhaust gas is returned to an intake system of the internal combustion engine, or it is fed to the intake system, an excessive amount of air, for a lean Combustion as part of a combustion improvement technology, For example, the improvement of the combustion of the internal combustion engine by generating eddy currents in their combustion chambers. In such an engine with lean combustion or arises in an internal combustion engine with a small displacement less heat of combustion, and the temperature of the coolant for cooling of the cylinder head and the cylinder block is not raised to a temperature level, the is sufficient for the an air conditioner for the use of the transferred from the coolant Heat designed is needed Heating power to match.
  • Around To improve the heating performance, were different technologies for the Increase the Temperature of the heater to the heat exchanger the air conditioning conducted coolant proposed, inter alia, one along a coolant line provided additional Heating device that communicates with the heating heat exchanger. In an internal combustion engine, however, as for example in the above unaudited Patent publication is described, is the coolant hose for the Supply of coolant to the heating heat exchanger only with the downstream Area of the cooling jacket connected to the cylinder head, without considering an increase in the Temperature of the heating heat exchanger supplied coolant.
  • in addition that comes to the heater core not connected coolant hose on the side of the end of the cylinder head, on which the thermostat cover is mounted, connected to the cylinder head, but on the other side, which therefore causes the coolant outlet located at scattered points on the cylinder head and thus a efficient work for complicate the production of the hose connection. From the point of view an efficient assembly of internal combustion engines is therefore the need to improve the situation.
  • OVERVIEW THE INVENTION
  • The invention has been made in view of this situation, and it is a common object of the first to third aspects of the invention to improve the performance of the heating heat exchanger of a water-cooled internal combustion engine in which refrigerant discharged from a refrigerant circulation pump via a head-side cooling jacket formed in a cylinder head a block-side cooling jacket formed of a cylinder block is improved by increasing the temperature of a guided in a heat exchanger heat exchanger coolant with a simple construction by the location of formed in the head-side cooling jacket inlet channel for coolant from the coolant circulation pump and a discharge channel for coolant, the is supplied to the heating heat exchanger, is thought appropriate. Further, an object of the invention according to the second aspect is the formation of a compact internal combustion engine by, for a compact transfer path of the refrigerant line forming elements such as Hoses are provided, which are connected to the radiator and the heating heat exchanger in a section in which an outlet area for the supply of coolant to the heating heat exchanger is provided. Furthermore, it is an object of the invention according to the third aspect to improve the performance in assembling an internal combustion engine and to reduce the number of components involved by the efficiency of the work for the connection of the coolant line forming elements such as the radiator and the heater core to improve the connected hoses.
  • in the Regard to the solution these tasks will be according to the first Aspect of the invention with a water-cooled internal combustion engine with Cylinders and a crankshaft provided in the case of a coolant circulation pump discharged coolant through a formed in a cylinder head head cooling jacket to one in a Cylinder block formed block-side cooling jacket is passed, wherein the water cooled Internal combustion engine, characterized in that an inlet duct, through which is discharged from the coolant circulation pump coolant in the head-side cooling jacket stream can, in the direction of the center axis of the cylinder head at an end portion and is provided on an intake side of the cylinder head and that a first exhaust passage through which the coolant from the head-side cooling jacket in a heating heat exchanger escape can, in the direction of the center axis of the cylinder head to the other End region and provided on an outlet side of the cylinder head is.
  • There according to the design according to the first aspect of the invention, the inlet channel in the direction of Center axis of the cylinder head at the one end portion of the cylinder head and on the intake side of the cylinder head and the first exhaust passage toward the center axis of the cylinder head at the other end and disposed on the exhaust side of the cylinder head can the distance between the inlet channel and the first outlet channel within a range for the formation of the cooling jacket extended , whereby the amount of heat, the the coolant can absorb, enlarged and thereby an increase the temperature of the heating heat exchanger supplied coolant allows which leads to an improvement of the heating performance. There the construction for the increase the temperature of the heating heat exchanger supplied refrigerant about that out of the location of the intake passage and the exhaust passage in the Cylinder head depends, the construction can be made simple. Since the inlet channel also on the intake side of the cylinder head are in the cylinder head formed inlet channels with coolant cooled, its temperature compared with a case where the intake passage on the exhaust side of the cylinder head opens, which is lower the charging power can be improved.
  • According to the second Aspect of the invention is for a water cooled Internal combustion engine as specified under the first aspect of the invention taken care of, with a receiving chamber for the inclusion of a thermostat in this chamber at the other end region and on an inlet side of the Cylinder head is provided.
  • According to the construction According to the second aspect of the invention, the invention additionally provides the advantage obtained by the first aspect for the following advantage. Because the Receiving chamber for the intake of the thermostat at the other end and on the inlet side the cylinder head is provided, where compared to the exhaust side of the cylinder head, on which the coolant line forming elements such as the hose for connecting the heating heat exchanger and the first outlet channel are provided, a space is formed is, can Elements containing the coolant line form, including of the hose for the connection of the thermostat with the radiator, in the direction of the central axis the cylinder head are arranged compactly at the other end region, whereby a compact internal combustion engine is made possible.
  • According to the third Aspect of the invention is for a water cooled Internal combustion engine as specified under the second aspect of the invention taken care of, with a thermostat cover to cover the thermostat provided on a fastening surface formed at the other end is, wherein the receiving chamber, the first outlet channel and a second Outlet passage through which the coolant from a main body of the Internal combustion engine in a radiator escape can, open in the mounting surface, where the receiving chamber on an inlet side and the first outlet channel and the second exhaust duct is located on an outlet side of the mounting surface and wherein an inlet conduit through which coolant from the radiator in pour in the thermostat may, a first outlet conduit through which coolant from the first inlet channel in the heating heat exchanger escape can, and a second outlet, through which coolant from the second exhaust passage into the radiator, in the thermostat cover are formed.
  • According to the construction of the third aspect of the invention, the following advantage is achieved beyond the advantage provided by the second aspect of the invention. At the attachment surface at the other end portion of the cylinder head where the thermostat cover is mounted, are Inlet line, the first outlet line and the second outlet line, which communicate with the receiving surface provided on the mounting surface, the first outlet channel and the second outlet channel respectively formed in the thermostat cover, which is a single element, and in addition, the inlet line, the first outlet line and the second exhaust pipe is collectively arranged at the other end portion of the cylinder head. The construction thereby facilitates the connection of the inlet line, the first outlet line and the second outlet line with the elements forming the coolant line for the connection of such lines respectively to the radiator, the heating heat exchanger and the radiator, whereby the efficiency of these connection work and thus the efficiency of the Assembly of the internal combustion engine can be improved. In addition, the design eliminates the need for separate production of, for example, connections needed to supply the coolant to the heater core, thereby shortening the number of components involved and, as a result, shortening the working time for making the connections and, accordingly, increasing the time a performance improvement in the assembly of the internal combustion engine is contributed.
  • At It should be noted that the term "viewed from above" as used herein contemplates the consideration means from a central axial direction of a cylinder bore and that the terms "inlet channel side Canal wall area "and" outlet channel side Canal wall area "respectively an inlet channel wall and an outlet channel wall mean that of considered above included within the range of the cylinder bore are. About that In addition, the term "cylinder head center axis" means a straight line in the cylinder head when viewed from the central axial direction of the cylinder, being an imaginary one Plane the central axis of the cylinder bores and the axis of rotation the crankshaft contains or an imaginary plane containing the central axes of the cylinder bores and parallel to the axis of rotation of the crankshaft. Furthermore, the terms "inlet side" and "outlet side" each mean one side of the cylinder head, on which intake ports for the intake ports located, and the other side of the cylinder, located on the outlet ports for exhaust ports located, based on the imaginary Levels.
  • SUMMARY THE DRAWINGS
  • 1 is a schematic perspective view of an internal combustion engine according to a first embodiment of the invention;
  • 2 is an exemplary view of a cooling system for the internal combustion engine in 1 ;
  • 3 is a sectional plan view of a cylinder head of the 1 shown internal combustion engine;
  • 4 is a sectional view taken along the line IV-IV in 3 ;
  • 5 is a sectional view taken along the line VV in 3 ;
  • 6 is a left side view of the cylinder head of the in 1 shown internal combustion engine;
  • 7 FIG. 15 is a sectional plan view of a main portion at a left end portion of the cylinder head of FIG 1 shown internal combustion engine in which a thermostat cover is mounted; and
  • 8th is a view in the direction of arrows VIII-VIII in 7 ,
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Embodiments of the invention will be described below with reference to FIGS 1 to 8th described.
  • First, it will open 1 Referring to FIG. 1, an internal combustion engine E having a cylinder head according to the invention is a water-cooled, four-cylinder, overhead camshaft, four-cycle internal combustion engine installed in a transverse crankshaft vehicle.
  • At it should be noted that the terms "longitudinal and transverse" used in the embodiments mean "longitudinal and transverse" of a vehicle, to which reference is made here.
  • The internal combustion engine E comprises a cylinder block 1 in which a first to fourth cylinder 5 1 to 5 4 (please refer 2 ) are arranged in series, wherein the cylinder cylinder bores 5a have, in which pistons are slidably mounted (see 3 ), a cylinder head 2 , which has an upper end of the cylinder block 1 is connected, one with the upper end of the cylinder head 2 connected cylinder head cover 3 and an oil pan 4 connected to a lower end of the cylinder block 1 connected is. A main body of the internal combustion engine E is formed by the cylinder block 1 , the cylinder head 2 , the cylinder head cover 3 and the oil pan 4 ,
  • An intake manifold 6 is on a front 2a of the cylinder head 2 mounted, which is the inlet side. The intake manifold 6 has a manifold 6a , located directly above the cylinder head cover 3 located and at the left Endbe rich a throttle body 7 is provided, and four branch pipes 6b suitable for connection to the front 2a of the cylinder head from the manifold 6a are branched off. The respective branch pipes 6a communicate over in the cylinder head 2 formed inlet channels 40 (please refer 3 ) with combustion chambers 8 1 to 8 4 (please refer 2 ) of the respective cylinder 5 1 to 5 4 , An exhaust manifold (not shown) is on a rear side 2 B (please refer 3 ) of the cylinder head 2 which is its outlet side, mounted.
  • Although not shown, there is further provided a power transmission mechanism for rotationally driving a camshaft (not shown) with the power from the crankshaft at one end and the right end of the cylinder block, respectively 1 and the cylinder head 2 provided in a cylinder head center axis direction A1, wherein the camshaft in a valve train chamber V (see 4 ) passing through the cylinder head 2 and the cylinder head cover 3 is formed, rotatably on the cylinder head 2 is stored. A transmission cover for the cover of the power transmission mechanism is on a right end surface of the cylinder block 1 and the cylinder head 2 intended. Further, a cam cover 10 for covering an opening in a cylindrical protruding area 9 formed on an extension of the camshaft in the axial direction, at the other end or a left end portion of the cylinder head Zy 2 is mounted in the cylinder head center axis direction A1 (with a direction in which the first to fourth cylinders 5 1 to 5 4 are arranged and coincident with a transverse direction in this embodiment).
  • The following will be mainly with reference to 2 a cooling system for the internal combustion engine E described. It is a coolant circulation pump 13 provided with a pump body 13a (please refer 1 ) integral with the cylinder block 1 is formed at its right end and its front, where a block-side cooling jacket 11 in the cylinder block 1 is formed. There is also a thermostat 15 on the cylinder head 2 provided in which a head-side cooling jacket 12 is formed, such that he is in a receiving chamber 14 can be included, which at the left end of the cylinder head 2 is formed. Further, it is ensured that the two coats 11 . 12 about a number of in the cylinder head 2 formed communication channels 16 communicate with each other.
  • A thermostat cover C is on one side or the left end surface of the cylinder head 2 mounted, and an inlet pipe 20 and two outlet pipes 21 . 22 are formed in the thermostat cover C. The thermostat 15 communicates via the inlet pipe 20 and a radiator hose 23 with a cooler 25 , and one in the cylinder head 2 educated leadership 26 communicates via the outlet pipe 21 and a radiator hose 24 with the radiator 25 , In addition, the cooling jacket communicates 12 over the outlet pipe 22 and a hose 27 with a heating heat exchanger 29 for an air conditioner, whereas he has the outlet pipe 22 and a hose 30 with one in the throttle body 7 formed coolant line communicates. Further, one in the cylinder head 2 formed return channel 32 and one in a tube 38 formed opening 33 (described later) each via a hose 28 and a hose 31 with the heating heat exchanger 29 and the coolant line in the throttle body 7 connected. Here are the respective hoses 23 . 24 . 27 . 28 . 30 . 31 the elements forming the coolant line.
  • That of the coolant circulation pump 13 discharged coolant flows from one in the cylinder head 2 formed inlet channel 35 over one in the cylinder block 1 formed outlet pipe 34 in the cooling jacket 12 , Because the thermostat 15 the communication between the radiator hose 23 and the receiving chamber 14 in the cold operating state of the internal combustion engine E separates, as shown by the dashed line in the figure, only a small amount of coolant flows through the communication path 16 in the cooling jacket 11 , and the coolant in the cooling jacket 12 flows through one in the cylinder head 2 formed bypass line 36 in the receiving chamber 14 while part of it after flowing through the hose 27 the heating heat exchanger 29 is supplied to carry out a heat exchange with air for heating the vehicle interior. After the heat in the coolant has been transferred to the air, the coolant returns via the hose 28 and the return channel 32 in the receiving chamber 14 back. Further, another part of the coolant in the cooling jacket 12 after flowing through the hose 30 the throttle body 7 fed to the throttle body 7 to heat when the engine is not warmed up, and then the coolant flows into the pipe 38 after putting the hose 31 flowed through. In addition, because the coolant in the receiving chamber 14 over the pipe 38 that with an inlet channel 37 connected in the cylinder head 2 is formed so that it is the receiving chamber 14 opens into the coolant circulation pump 13 is sucked, the coolant flows in cold operating condition of the machine through the cooling jacket 12 without the cooler 25 to flow through.
  • Because the thermostat 15 In addition, when the engine is in the warm operating condition, there is communication between the radiator hose 23 and the receiving chamber 14 and the bypass line 36 closes simultaneously, the coolant flows in the cooling jacket 12 through the communication path 16 in the cooling jacket 11 as based on the solid lines shown in the figure to the cylinder block 1 to cool it without passing through the bypass line 36 in the receiving chamber 14 flows. Thereafter, the coolant flows through a medium in the cylinder block 39 educated leadership 39 and through the outlet pipe 21 and the radiator hose 24 in the cooler 25 , After its temperature by heat dissipation in the radiator 25 was lowered, the coolant flows through the inlet pipe 20 and the thermostat 15 through the radiator hose 23 in the receiving chamber 14 , Meanwhile, a part of the coolant in the cooling jacket 12 the heating heat exchanger 29 supplied, as is the case when the machine is in the cold operating state, in which heat is given off to the air therein, and then returns to the receiving chamber 14 , In addition, this becomes the throttle body 7 supplied coolant in terms of its flow rate by a control / regulating valve (not shown) controlled to overheat the throttle body 7 to prevent. The coolant in the receiving chamber 14 is then via the outlet channel 37 and the pipe 38 into the coolant circulation pump 13 sucked, and when the machine is in the warm operating condition, the coolant flowing through the radiator flows 25 has passed through the two cooling jackets 11 . 12 ,
  • The following is with reference to the 3 . 4 the construction of the cylinder head 2 described. It should be noted that in 3 the cross sections of an inlet channel 40 and an exhaust duct 41 of the third cylinder 5 3 from those of the remaining cylinders 5 1 . 5 2 . 5 4 differentiate to represent their cross sections closer to a combustion chamber 8s lie.
  • In the cylinder head 2 are combustion chambers 8 1 to 8 4 (please refer 2 . 4 ) formed in such a way that they communicate with the cylinders 5 1 to 5 4 in the cylinder block 1 correspond, and there is an inlet channel 40 and an exhaust duct 41 for each combustion chamber provided such that they each with the combustion chambers 8 1 to 8 4 communicate. Each inlet channel 40 has an inlet valve opening 40a that relate to each of the combustion chambers 8 1 to 8 4 opens and which is opened and closed by an inlet valve (not shown), and an inlet channel 40b moving to the front 2a of the cylinder head 2 opens and to the branch pipe 6b the intake manifold 6 connected. In contrast, each outlet channel has 41 an outlet valve opening 41a that relate to each of the combustion chambers 8 1 to 8 4 opens and passes through an exhaust valve 42 (please refer 4 ) is opened and closed, and an outlet channel 40b that goes to the back 2 B of the cylinder head 2 opens and to which the exhaust manifold is connected.
  • Further, in the cylinder head 2 two attachment areas 43 . 44 formed in such a way that these in each case to the inlet channel 40 and to the exhaust duct 41 connect, each with insertion openings 43a . 44a in which each of the combustion chambers 8 1 to 8 4 facing spark plugs (not shown) are used. As in 3 is shown are the attachment area 43 and the inlet channel 40 in this order for each combustion chamber 8 1 to 8 4 arranged from the other end portion or the right end portion (which, as in 3 can be seen, located at the left end) of the cylinder head 2 in the cylinder head center axis direction A1 on the inlet side thereof, whereas the exhaust passage 41 and the attachment area 44 in this order from the right end of the cylinder head 2 are arranged on the outlet side.
  • Also referring to 4 is the cooling jacket 12 through a bottom wall 45 formed, which is a chamber wall of the combustion chamber 8 1 to 8 4 forms an upper wall 46 forming a chamber wall of a valvetrain chamber V in which a valvetrain (not shown) formed by the camshaft and the like for driving the intake valve and the exhaust valve 42 is housed, a canal wall 47 that the inlet channel 40 forms, a canal wall 48 that the exhaust duct 41 forms, and a wall of the cylinder head 2 , the walls 43b . 44b the attachment areas 43 . 44 for the two spark plugs. The cooling jacket 12 comprises an inlet-side jacket region 12a , an outlet side cladding region 12b and a central jacket area 12c , The inlet-side jacket area 12a located on the inlet side of the cylinder head 2 and extends between the right and left end portions of the cylinder head 12 along the cylinder head center axis A1 at a position closer to the intake port 40b of the intake channel 40 as at the combustion chamber 8 1 to 8 4 lies. The outlet-side jacket area 12b is located on the exhaust side of the cylinder head and extends between the left and right end portions of the cylinder head 12 along the cylinder head center axis A1 at a position closer to the exhaust port 41b of the intake channel 41 as at the combustion chamber 8 1 to 8 4 lies. The central coat area 12c extends at the cylinder head center axis L1 between the left and right end portions of the cylinder head 2 directly at the combustion chamber 8 1 to 8 4 , The central coat area 12c and the inlet-side and outlet-side cladding regions 12a . 12b communicate with each other between the adjacent combustion chambers 8 1 . 8 2 ; 8 2 . 8 3 ; 8 3 . 8 4 when viewed from above. Further, communicate at the right end portion of the cylinder head 2 the central coat area 12c and the inlet-side and outlet-side cladding regions 12a . 12b with each other via a communication area 12d ,
  • As 4 shows is the inlet side cladding region 12a in the inlet channel 40 on the website his bottom wall 45 formed and not on the side of its upper wall 46 whereas the outlet side shell region 12b in each outlet channel 41 on the side of the bottom wall 45 , the side of the upper wall 46 and in a wall between the adjacent outlet channels 41 formed in such a way that it is the outlet duct 41 encloses.
  • Further, on the inlet side of the right end portion of the cylinder head 2 , as in 3 shown with the outlet pipe 34 (please refer 2 ) communicating inlet channel 35 at a connection surface to the cylinder block 1 is formed in such a manner as to be near the front end portion and the right end portion of the inlet side skirt portion 12a to the inlet-side jacket area 12a opens. In addition, the receiving chamber communicates 14 of the thermostat 15 on the inlet side of the left end of the cylinder head 2 over the bypass line 36 with the inlet-side jacket area 12a , one with the hose 27 The heater connected to the heat exchanger 29 connected, communicating exhaust duct 52 is formed so as to be in the cylinder head center axis direction A1 at the rear end portion and the left end portion of the outlet side skirt portion 12b to the outlet side jacket area 12b opens. Furthermore, an outlet channel 51 , over the wires 39 . 26 with the cooling jacket 11 as well as over the radiator hose 24 with the radiator 25 communicates between the receiving chamber 14 and the outlet channel 52 in a direction perpendicular to the cylinder head center axis direction A1 as viewed from above (hereinafter referred to as "normal direction"). At the left end of the cylinder head 2 leads an exhaust duct 37 to the with the coolant circulation pump 13 communicating pipe 38 connected to the front 2a of the cylinder head 2 whereas the return channel 32 , to the one with the heating heat exchanger 29 connected hose 28 connected with its back 2 B communicated. Furthermore, around the respective combustion chambers 8 1 to 8 4 in the circumferential direction and at certain intervals a number of communication lines 16 for the supply of coolant, that of the coolant circulation pump 13 is discharged, over the cooling jacket 12 to the cooling jacket 11 educated.
  • Referring to 3 , mainly in conjunction with 5 , are from the combustion chambers 8 1 to 8 4 , except for the combustion chamber 8 4 of the left, in the cylinder head center axis direction A1 from the intake passage 35 furthest spaced end, in intake passage side channel wall portions 47a the canal walls 47 , each with the combustion chambers 8 2 ; 8 3 ; 8 4 in this order from the inlet duct 35 are positioned toward the downstream side of the coolant flow, communicating inlet channels 40 form, plate-like deflection ribs 53 . 54 integral with the cylinder head 2 Shaped at areas that are close to the adjacent combustion chambers 8 2 ; 8 3 ; 8 4 lie on the downstream side of the coolant.
  • In the combustion chambers 8 1 . 8 2 ; 8 2 . 8 3 ; 8 3 . 8 4 which adjoin each other in the cylinder head center axis direction A1 is of the deflecting ribs 53 . 54 between the inlet channel side channel wall area 47a the combustion chambers 8 1 ; 8 2 ; 8 3 located on an upstream side of the coolant flow and an outlet channel side channel wall area 48a the combustion chambers 8 2 ; 8 3 ; 8 4 , which are downstream of the combustion chambers 8 1 ; 8 2 ; 8 3 lie, the barb 53 for the two chambers 8 1 ; 8 2 provided in such a way that they are from the bottom wall 45 protrudes upward and in a curved shape in the direction of the outlet channel side channel wall area 48a the canal wall 48 which extends the exhaust duct 41 the one on the downstream side of these adjacent combustion chambers 8 2 ; 8 3 forms. The barking rib 53 has a proximal area 53a , a distal area 53b and a lower area 53c and an upper end portion 53d , The proximal area 53a is a to the inlet channel side channel wall area 47 subsequent area. The distal area 53b is an outlet channel side channel wall area 48a facing end region. The lower area 53c is one on the bottom wall 45 subsequent area, while the upper end area 53d one of the upper wall 46 facing end region is.
  • The distal area 53b reaches substantially the imaginary plane and has a predetermined height in a central axial direction A2, which is a direction of a central axis of the cylinder bore 5a or in this embodiment is a height in which the upper end portion 53d is located at a position which is slightly lower than a central position of the central shell region 12c in the central axial direction A2.
  • Every barb 53 is shaped in such a way that it is between the distal end portion 53a and the outlet channel side channel wall area 48a Leaves a gap, so that through the central shell area 12c passing coolant along the wall surfaces of the bottom wall 45 and the outlet channel side channel wall portion 48a can flow. There is also a gap 56 also between the upper end area 53d and the upper wall 46 educated.
  • The barking rib 54 extending from the inlet passage side channel wall area 47a for the third cylinder 5 3 corresponding combustion chamber 8 3 extends, differs from the deflection rib 53 in that the rib becomes a flat plate-like configuration and that they are over a shorter distance in the direction of the outlet channel side channel wall area 48a extends. These differences are caused by the fact that the barbed rib 54 at the inlet channel side channel wall area 47a is provided, which is located at a position near the downstream end portion of the cooling jacket 12 is located, and by the fact that the flow rate of the in the central cladding region 12c in the cylinder head center axis direction A1 flowing coolant compared with the flow rate in the vicinity of the deflection rib 53 located upstream of the deflector rib 54 located near the barb rib 54 becomes smaller. However, that's through the barking rib 54 at the outlet channel side channel wall area 48a provided cooling effect substantially equal to that by the deflection rib 53 provided.
  • The configuration and location of the deflector ribs 53 . 54 are thus mainly with a view to achieving the improvement of the cooling effect on the outlet channel side channel wall region 48a by a deflection of the coolant flow in the direction of the outlet channel side channel wall region 48a set appropriately.
  • The respective deflection ribs 53 . 54 allow the coolant in the central shell area 12c between the inlet channel side channel wall portions 47a and the outlet channel side channel wall portions 48a the respective combustion chambers 8 1 to 8 4 that flows coolant that flows to positions closer to the bottom wall 45 and at the inlet channel side channel wall portions 47a lie, in the direction of the outlet channel side channel wall areas 48a the combustion chambers 8 2 ; 8 3 ; 8 4 that can contiguous on the downstream side can flow while the coolant flowing at a position closer to the top wall 46 of the central shell region 12c is located in the cylinder head center axis direction A1 through the gap 56 can flow.
  • In addition, one is linearly continuous along the imaginary plane between the left and right end portions of the cylinder head 12 extending central rib 57 at the imaginary plane (viewed from above on the cylinder head central axis L1) shaped to be from the bottom wall 45 protrudes to a level lower than the deflection ribs 53 . 54 , The distal areas 53b . 54b the deflector ribs 53 . 54 are then with the central rib 57 connected.
  • There is also a rib 58 at the outlet channel side channel wall area 48a the combustion chamber 8 1 formed, the inlet duct 35 closest to each other, located at the right end portion of the cylinder head 2 located at a position closer to a communication area 12d lies. The rib extends toward the attachment area 43 in the normal direction to reach the imaginary plane, and has a height substantially equal to that of the deflecting ribs 43 . 54 is. Part of the coolant coming from the inlet duct 35 towards the central mantle area 12c flows through this rib 58 deflected towards the outlet jacket area 12b to be able to flow.
  • In addition, it causes a waste gas exhaust pipe 59 an exhaust gas recirculation device for returning the exhaust gas into an intake system of the internal combustion engine E to the exhaust passage 41 the combustion chamber 8 1 opens, the right end of the cylinder head 2 is closest. This exhaust outlet pipe 59 extends along the communication area 12d of the cooling jacket 12 in a direction perpendicular to the imaginary plane while passing over the inlet channel 35 leads to thereby in the front 2a of the cylinder head 2 to open. Furthermore, the line communicates 59 with a return control valve (not shown) for controlling the amount of refrigerant returned to the induction system.
  • With reference to the 6 to 8th Hereinafter, the thermostat cover C will be described, which at the left end portion of the cylinder head 2 is mounted.
  • In the 6 . 7 is a mounting surface 60 on a left end surface of the cylinder head 2 formed where the thermostat cover C is mounted. The at the left end of the cylinder head 2 formed and a recessed area receiving chamber 14 located on the inlet side of the cylinder head 2 and down and in front of the projecting area 9 which is located at an axial extension of the camshaft and an intake passage 61 has, which also forms the opening, extending into the mounting surface 60 opens. A tiered area 62 is at a peripheral edge portion of the intake passage 61 formed, on which an annular holding area 15a of the thermostat 15 is arranged, causing the thermostat 15 on the cylinder head 2 is fixed when the holding area 15a between the stepped area 62 and the thermostat cover C is held. This causes the thermostat 15 and the receiving chamber 14 provided on the intake side of the cylinder head, so that they are on the same side of the coolant circulation pump 13 located on the inlet side of the cylinder block 1 is provided.
  • A tiered area 63 , which is formed flatter than the stepped area 62 , is at the äuße ren peripheral side of the stepped area 62 formed, and an annular elastic seal 65 made of a synthetic rubber or synthetic resin, such as a sealing ring, is in an annular groove 64 inserted through the stepped area 63 and the holding area 15a is formed.
  • The communication line 26 that have a partition 66 on the back of the receiving chamber 14 is located, has the outlet channel 51 that is in the mounting surface 60 opens. The outlet channel 52 of the cooling jacket 12 opens on the back of the exhaust duct 51 one being a part of the mounting surface 60 forming interface 60a a partition 67 extending in the central axial direction A2 between the cooling jacket 12 and the line 26 is held. In addition, there is a mounting hole 68 formed so that these from the back 2 B of the cylinder head 2 to the exhaust duct 52 leads to a coolant temperature sensor for detecting the coolant temperature at the exhaust passage 52 take.
  • Furthermore, includes a liquid seal 69 a silicone material which is a sealing material, for example FIPG, placed on a non-circular, annular area of application at circumferential edge regions of the two outlet channels 51 . 52 at the attachment surface 60 is applied, with the exception of the interface 60a ,
  • Referring to the 1 . 7 and 8th has the at the mounting surface 60 attached thermostat cover C a first cover portion C1, which is a receiving chamber 71 for holding a part of the thermostat 15 forms, leaving the thermostat 15 and the inlet channel are covered, and a second cover region C2 for covering the two outlet channels 51 . 52 , The thermostat cover C is integrally molded of an aluminum alloy. Furthermore, four through-holes H5 to H8 are formed at positions provided with threaded holes H1 to H4 (see FIG 6 ) correspond, in the mounting surface 60 are formed so that four bolts B (see 1 ) are inserted therethrough so as to the thermostat cover C on the cylinder head 2 to fix.
  • In the first coverage area C1, there is a connection area 70 , the inlet pipe 20 and a mounting hole 73 educated. The connection area 70 is with the radiator hose 23 (please refer 2 ) connected. The inlet pipe 20 is for communication with the radiator hose 23 adapted to allow that in the radiator 25 cooled coolant into the receiving chamber 71 that is part of the thermostat 15 and continues into the inlet channel 61 can flow. A temperature switch 72 (please refer 1 ) for detecting the coolant temperature from the radiator 25 is at the mounting hole 73 appropriate.
  • On the other hand, at the second coverage area C2, a connection area 74 with which the radiator hose 24 is connected and which is in a position closer to the first coverage area C1, and a connection area 75 with which the hose 27 (please refer 2 ) and located on the back of the connection area 74 is provided. Further, in the second coverage area C2, the exhaust passage 21 and the outlet pipe 22 formed in such a way that they pass through a dividing wall 77 are separated. The outlet pipe 21 has an inlet channel 21a which is essentially with the exhaust duct 51 Aligns and the one for communication with the radiator hose 24 (please refer 2 ) is adapted so that coolant from the outlet channel 51 in the cooler 25 can flow. The outlet pipe 22 has an inlet channel 22a which is essentially with the exhaust duct 52 Aligns and communicates with both hoses 27 . 30 is adjusted so that coolant from the exhaust duct 52 each in the heating heat exchanger 29 and the throttle body 7 can flow.
  • Furthermore, has a flange 78 the thermostat cover C a mounting surface 79 , which is adapted to coincide with the mounting surface 60 of the cylinder head 2 at the attachment surface 60 can be brought to the plant, and forms part of the first and the second cover area C1, C2. The flange 78 has a curved recessed area 78a of the configuration of an outer peripheral surface of a lower portion of the projecting portion 9 corresponds, causing the camshaft and the thermostat 15 and both outlets 51 . 52 in the central axial direction A2 as close to each other as possible by allowing the lower portion of the projecting portion 9 in the recessed area 78 can be used.
  • in the Following are the construction and effectiveness of the first embodiment explains which is formed in the manner described above.
  • As 3 shows, coolant coming from the inlet channel 35 located at the front end portion and right end portion and near the cooling jacket 12 located in the cooling jacket 12 flows into the central cooling jacket area 12c and the outlet side cladding region 12b steered, after it, while it is the inlet-side jacket area 12a flows through, through the communication area 12 has flowed through. As a part of the coolant entering the central shell area 12c is steered, through the ribs 58 to the outlet term coat area 12b is deflected, can from these coolant flows a larger amount of coolant through the outlet side jacket area 12b stream. This allows the coolant in the respective jacket areas 12a . 12b . 12c towards the left end portion of the cylinder head 12 flow, and when the machine is in the warm operating condition, flows a part of the coolant from the communication line 16 in the cooling jacket 12 in the cylinder block.
  • Then the coolant flows in the central shell area 12c at the positions closer to the bottom wall 45 and the inlet channel side channel wall area 47a are through the deflector ribs 53 . 54 in the direction of the outlet channel side channel wall areas 48a the combustion chambers 8 2 ; 8 3 ; 8 4 distracted, with the combustion chambers 8 1 ; 8 2 ; 8 3 adjacent to each other, which are located on the downstream side. Then, the thus deflected coolant flows against the outlet channel side channel wall portions 48a and thereafter, the coolant that has flowed in this manner joins with the coolant in the outlet side jacket portion 12b ,
  • In the outlet-side jacket area 12b the coolant flows on the side of the bottom wall 45 and on the side of the upper wall 46 relative to each exhaust duct 41 and between the adjacent walls of the outlet channels 41 towards the left end portion of the cylinder head 2 , Then the coolant flows out of the outlet channel 52 located at the rear end portion and the left end portion of the cylinder head 2 located, towards the heating heat exchanger 29 and the throttle body 7 ,
  • While this takes place, as in the 4 . 5 shown are the deflector ribs 53 . 54 between the inlet channel side channel wall portions 47a the combustion chambers 8 1 ; 8 2 ; 8 3 provided, which are located on the upstream side of the coolant flow, and the outlet channel side channel wall portions 48a the combustion chambers 8 2 ; 8 3 ; 8 4 located downstream of the combustion chambers 8 1 ; 8 2 ; 8 3 such that they are from the bottom wall 45 protrude upwards. Further, the deflecting ribs 53 . 54 formed in such a way that they each have columns 55 between the outlet channel side channel wall areas 48 and let yourself, leaving the coolant on the respective walls of the bottom wall 45 including the central rib 57 and the outlet channel side channel wall portion 48a flow, whereby there is no danger that the coolant to the respective wall surfaces of the bottom wall 45 and the outlet channel side channel wall portion 48a Stagnated at the area where the gap 55 is formed.
  • Since a part of the coolant is deflected toward the exhaust passage side channel wall portion 48a to flow from the the cooling jacket 12 forming walls of the cylinder head 2 has the highest heat load, the cooling effect on the outlet channel side channel wall area 48a verbes sert, and unlike the case in which the conventional continuous rib is used, no stagnation of the coolant at the respective walls of the bottom wall 45 and the outlet channel side wall portion 48 caused at the position where the gap 55 is formed. Further, a part of the coolant flows from the gap 55 around the back of the baffles, whereby the area where the stagnation of the coolant is generated, through the baffles 53 . 54 in turn is reduced, as an area on the wall of the bottom wall 45 where the coolant stagnation is generated is reduced, reducing the cooling effect on the bottom wall 45 and the outlet channel side channel wall area 48a is improved, whereby it is possible to effectively cool the area with the highest heat load. The amount of heat absorbed by the coolant is due to the effective cooling of the wall 45 and the outlet channel side channel wall portion 48a elevated. Thereby, the heating performance is improved when the coolant whose temperature is raised in this way, the heater core 29 is supplied.
  • Because the central rib 57 on the bottom wall 45 of the cylinder head 2 is provided and from the bottom wall 45 protrudes upward and in the cylinder head center axis direction A1 between the left and the right end portion of the cylinder head 2 may extend between the inlet channel side channel wall area 47a and the outlet channel side channel wall area 48a of the cylinder head 2 flowing coolant downstream while being straightened along the cylinder head center axis L1, whereby the chamber wall of the combustion chamber 8 1 to 8 4 passing through the bottom wall 45 , the inlet channel side channel wall area 47a and the outlet channel side channel wall area 48a is formed, can be cooled substantially the same. In addition, wear the central rib 57 and attached to the central rib 57 subsequent deflection ribs 53 . 54 for improving the strength of the entirety of the cylinder head 2 at. Because the central rib 57 and the barb rib 53 are provided so that they chamber over the adjacent Brenn 8 1 . 8 2 ; 8 2 . 8 3 extend to strengthen the strength of the cylinder head at areas between the combustion chambers 8 1 . 8 2 ; 8 2 . 8 3 at.
  • Since the respective jacket areas 12a . 12b . 12c are formed in such a manner as to extend substantially along the cylinder head center axis direction A1 between the left and right end portions of the cylinder head 2 extend and darü Beyond the inlet duct 35 at the positions at the front end portion and the right end portion and in the vicinity of the cooling jacket 12 at the right end portion of the cylinder head 2 is arranged on the inlet side, whereas the outlet channel 52 at the rear end portion and left end portion of the cooling jacket 12 at the left end portion of the cylinder head 2 Located on the outlet side, the distance between the inlet channel 35 and the outlet channel 52 within the range in which the cooling jacket 12 is formed, whereby the amount of heat absorbed by the coolant is increased, and it is again the temperature of the heating heat exchanger 29 supplied coolant increases, so that the heating power is improved thereby. As the design to increase the temperature of the coolant, which is the heater core 29 is supplied from the position of the inlet channel 35 and the outlet channel 52 depends, the construction is simple.
  • Because the inlet channel 35 on the intake side of the cylinder head 2 is compared with a case where an intake passage for from the refrigerant circulation pump 13 discharged coolant in the outlet side of the cylinder head 2 that opens in the cylinder head 2 formed inlet channel 40 cooled by a coolant whose temperature is lower, whereby the charging efficiency is improved.
  • Because the exhaust duct 52 further in the outlet side jacket area 12b opens, enclosing the outlet channels 41 extends, which are exposed to a higher heat load, and because the bypass line 36 further into the inlet-side jacket region 12b opens, can prevent the temperature of the coolant in the inlet-side jacket portion 12 by the coolant in the outlet side jacket area 12b is lowered, thereby allowing the temperature of the exhaust duct 52 keep outflowing coolant high. The heating performance can be improved in this regard. In addition, the outlet channel 51 between the outlet channel 52 and the receiving chamber 14 at the left end portion of the cylinder head 2 arranged. And the outlet channel continues to the line 26 through which when passing the cooling jacket 12 heated coolant flows through and then when passing the cooling jacket 11 is heated further. The heat of the coolant flowing through this outlet 51 flows, is transferred to the coolant that flows through the partition wall 67 through the outlet channel 52 passes through, whereby the temperature of the heating heat exchanger 29 supplied coolant is in turn increased, which allows an improvement in the heating power.
  • Because the exhaust duct 52 is further formed in such a way that it is in the cylinder head center axis direction A1 in the outlet-side jacket portion 12b opens, a stagnation of the coolant, which is in the outlet-side jacket area 12b flows, which is formed substantially along the cylinder head direction A1, preventing, whereby the coolant freely in the direction of the exhaust passage 52 can flow, causing the cooling effect on the cylinder head 2 and in particular on its more heat-loaded outlet side is improved.
  • As at the left end of the cylinder head 2 the recording area 14 for the recording of the thermostat 15 on the inlet side of the cylinder head 2 provided and the space here and not formed on the exhaust side of the cylinder head, where the hoses 24 . 27 for the communicating connection of the radiator 25 and the Heizungswärmeaustauschers 20 with the outlet channel 51 and the outlet channel 52 can be arranged, the arrangement of the tubes at the left end portion of the cylinder head 2 including the hose 23 for the connection of the thermostat 15 with the radiator 25 be made compact, which in turn also the internal combustion engine E can be compactly built.
  • Because the thermostat 15 not at the right end portion of the cylinder head 2 is provided, where the valve drive mechanism is arranged for the rotary drive of the camshaft, but at the left end portion of the cylinder head 2 There are no restrictions due to the way around the radiator hose 23 arranged elements for enabling the flow of coolant in the thermostat 15 , whereby a more compact design of the internal combustion engine is possible. Because the thermostat 15 and the receiving chamber 14 beyond that on the inlet side of the cylinder block 1 are arranged, whereas the coolant circulation pump 13 on the intake side of the cylinder head 2 is located, the thermostat can 15 and the coolant circulation pump 13 are arranged relative to the main body of the internal combustion engine E on the same side, whereby the distance from the thermostat 15 to the coolant circulation pump 13 shorten and consequently the internal combustion engine E compact build.
  • At the first cover portion C1 of the thermostat cover C, which includes the first and second cover portions C1, C2, is integral with the inlet pipe 20 for enabling the flow of coolant from the radiator 25 to which the thermostat 15 receiving intake duct 61 formed, wherein the radiator hose 23 with the connection area 70 whereas, at the second cover portion C2, the outlet pipe 21 for enabling coolant flow from the exhaust duct 51 in the cooler 25 is provided, wherein the radiator hose 24 with the connection area 74 and the outlet pipe 22 for enabling coolant flow from the exhaust duct 52 in the Neizungswärmeaustauscher 29 and the throttle body 7 connected, with the hoses 27 . 30 each with the Verbindungsberei chen 75 . 76 are connected. As a result, are on the mounting surface 60 the connection areas 70 . 74 . 75 . 76 with which the hoses 23 . 24 . 27 . 30 for establishing communication between the inlet duct 61 and the two in the attachment area 60 and the radiator 25 formed outlet channels 51 . 52 are connected, the heating heat exchanger 29 and the throttle body 7 formed on the formed as a single element thermostat cover C, and moreover, they are collectively on the left end portion of the cylinder head 2 provided, whereby the connection of the respective hoses 23 . 24 . 27 . 30 , through which the coolant can flow, facilitates and the work efficiency is increased. This helps to increase the performance in assembling the engine E and the need to provide separate elements necessary for the supply of the coolant to the heater core 29 and to the throttle body 7 necessary, such as connections, to get around. This can reduce the number of components involved. The result is a reduction in the working time required for assembling the connections, so that the performance in assembling the internal combustion engine can be improved in this respect.
  • Because the recessed area 78a in the flange area 78 the thermostat cover C is formed to have the lower part of the projecting portion therein 9 from the left end portion of the cylinder head 2 protrudes, the camshaft and the thermostat 15 and the outlet channels 51 . 52 be arranged as close to each other as possible in the central axial direction A2, whereby the dimensions of the internal combustion engine E in the cylinder head center axis direction A1 and in the central axial direction A2 can be reduced. The result is that the overall height of the engine E can be reduced.
  • below becomes an embodiment described in the part of the preceding embodiment is modified, with only the modified part is explained.
  • While in the above embodiment, an intake valve and an exhaust valve for each combustion chamber 8 1 to 8 4 are provided, the invention can be applied to an internal combustion engine in which a pair of intake valves and a pair of exhaust valves are provided for each combustion chamber. While the internal combustion engine of the above embodiment is a four-cylinder internal combustion engine, any other multi-cylinder internal combustion engine may be used.
  • at an internal combustion engine with cylinders and a crankshaft from a coolant circulation pump discharged coolant through a in a cylinder head formed cooling jacket in the cylinder block formed cooling jacket fed. An inlet passage through which the from the coolant circulation pump discharged coolant in the cooling jacket flows, is at an end portion in the cylinder head center axis direction the cylinder head arranged on the inlet side, whereas an exhaust passage through which the coolant in the cooling jacket in a heating heat exchanger escape can, at the other end of the cylinder head on the exhaust side is arranged.

Claims (7)

  1. water-cooled Internal combustion engine with cylinders and a crankshaft, comprising: one Cylinder block, which receives the cylinder in it and the one block side cooling jacket Are defined; and a cylinder head with an upper area the cylinder block is connected and a head-side cooling jacket Are defined, being from a coolant circulation pump discharged coolant over the head-side cooling jacket the block-side cooling jacket supplied becomes, further comprising a first inlet channel of the cylinder head, by which of the coolant circulation pump discharged coolant in the head-side cooling jacket pour in can, in a cylinder head center axis direction at an end portion and disposed on an intake side of the cylinder head, and in which Further, a first exhaust passage of the cylinder head, through which that of the coolant circulation pump discharged coolant in a heating heat exchanger pour in can, in the cylinder head center axis direction is arranged on the other end portion and on an outlet side of the cylinder head.
  2. water-cooled Internal combustion engine according to claim 1, wherein a receiving chamber for receiving a thermostat at the other end portion and on an inlet side the cylinder head is provided.
  3. A water-cooled internal combustion engine according to claim 2, further comprising: a thermostat cover provided for covering the thermostat on a mounting surface provided at the other end portion of the cylinder head, wherein the receiving chamber, the first outlet channel and a second outlet channel, through which the coolant can flow from a main body of the internal combustion engine into a radiator, are formed so that they open in the mounting surface, wherein the receiving chamber on an inlet Side and the first outlet channel and the second outlet channel are located on an outlet side of the mounting surface and wherein the thermostat cover forms an inlet conduit through which coolant from the radiator can flow into the thermostat, a first outlet conduit through which coolant from the first Inlet passage can flow into the heating heat exchanger, and a second outlet conduit through which coolant from the second outlet channel can flow into the radiator.
  4. water-cooled Internal combustion engine according to claim 3, wherein the thermostat cover is formed such that the second outlet line between the Inlet line and the first outlet line is arranged.
  5. water-cooled Internal combustion engine according to claim 3, wherein the first exhaust passage is formed so that it opens in the cylinder head center axis direction.
  6. water-cooled Internal combustion engine according to claim 3, wherein the thermostat cover a first coverage area defining the inlet conduit and defining the first and second exhaust ducts second coverage area and one between the first and the Having the second cover region formed flange region and the flange area at its upper end has a curved recessed Area forms.
  7. water-cooled Internal combustion engine according to claim 2, wherein the receiving chamber a second inlet passage through which coolant from a radiator in flow the thermostat can, and a third outlet channel through which coolant in the receiving chamber in the coolant circulation pump stream can, and wherein the second inlet channel is formed such that it opens in the cylinder head center axis direction, and wherein the third exhaust passage is formed to be in a direction substantially to the cylinder head center axis direction vertical direction opens.
DE2002614279 2001-05-17 2002-05-15 Water-cooled internal combustion engine Expired - Fee Related DE60214279T8 (en)

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Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60310539T2 (en) * 2003-06-19 2007-09-27 Aktiebolaget Volvo Penta exhaust manifold
JP4213012B2 (en) * 2003-10-10 2009-01-21 愛知機械工業株式会社 Cooling channel structure of internal combustion engine
DE102004005749B4 (en) * 2004-02-05 2014-01-02 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Coolant-jacketed cylinder head with optimized coolant space
KR101013971B1 (en) * 2008-11-18 2011-02-14 기아자동차주식회사 Cooling circuit of engine
US8146544B2 (en) * 2009-03-05 2012-04-03 GM Global Technology Operations LLC Engine cylinder head cooling features and method of forming
AT506468B1 (en) * 2009-03-24 2010-12-15 Avl List Gmbh Cylinder head of an internal combustion engine
AT506473B1 (en) 2009-04-23 2010-12-15 Avl List Gmbh Cylinder head of an internal combustion engine
EP2309106B1 (en) * 2009-07-30 2017-06-07 Ford Global Technologies, LLC Cooling system
JP5530998B2 (en) * 2011-11-21 2014-06-25 本田技研工業株式会社 Water outlet structure of internal combustion engine
JP5587380B2 (en) * 2012-10-19 2014-09-10 本田技研工業株式会社 Cylinder head water jacket structure
JP6055322B2 (en) * 2013-01-28 2016-12-27 本田技研工業株式会社 Cooling structure for internal combustion engine and method for manufacturing internal combustion engine having the cooling structure
US9140176B2 (en) * 2013-01-29 2015-09-22 Ford Global Technologies, Llc Coolant circuit with head and block coolant jackets connected in series
JP2014227922A (en) * 2013-05-23 2014-12-08 ヤマハ発動機株式会社 Cooling device of internal combustion engine, and motor cycle equipped with the same
GB2516647B (en) * 2013-07-29 2016-02-03 Jaguar Land Rover Ltd Vehicle water jacket
AT514793B1 (en) 2013-09-16 2015-06-15 Avl List Gmbh Cooling system for an internal combustion engine
US9677456B2 (en) * 2014-05-13 2017-06-13 Ferrari S.P.A. Vehicle driven by an internal combustion engine and provided with a liquid cooling system
EP3175099B1 (en) * 2014-08-01 2018-09-19 PIAGGIO & C. S.p.A. A water-cooled internal combustion engine
JP6267614B2 (en) * 2014-09-29 2018-01-24 株式会社クボタ Engine water cooling system
KR101601224B1 (en) * 2014-10-29 2016-03-08 현대자동차주식회사 Engine cooling system that separately cools head and block
JP6397521B2 (en) * 2017-02-15 2018-09-26 本田技研工業株式会社 Cooling water passage structure of internal combustion engine
KR20180123267A (en) * 2017-05-08 2018-11-16 현대자동차주식회사 Fuel Reforming System
US10876462B1 (en) 2019-07-18 2020-12-29 Ford Global Technologies, Llc Coolant jacket insert

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0224931Y2 (en) * 1985-06-12 1990-07-09
US5113807B1 (en) * 1989-07-19 1994-10-25 Kobayashi Manabu Cooling system for engine
GB9012364D0 (en) * 1990-06-02 1990-07-25 Jaguar Cars Engine cooling systems
GB2335483A (en) * 1998-03-19 1999-09-22 Ford Global Tech Inc Method and apparatus for cooling an engine using exhaust gas
JP3354519B2 (en) 1999-03-31 2002-12-09 本田技研工業株式会社 Engine cooling structure

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US20020170506A1 (en) 2002-11-21
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AU781639B2 (en) 2005-06-02
DE60214279T8 (en) 2007-05-10
JP3775572B2 (en) 2006-05-17
CN1386965A (en) 2002-12-25
TW538194B (en) 2003-06-21
EP1258609A2 (en) 2002-11-20
US6732679B2 (en) 2004-05-11
EP1258609A3 (en) 2003-07-16
DE60214279D1 (en) 2006-10-12
AU4067502A (en) 2002-11-21
EP1258609B1 (en) 2006-08-30

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Inventor name: IIZUKA, YOSHIAKI, WAKO-SHI, SAITAMA, JP

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